Curved Apex Hydrocyclone for Coarse Particle Classification
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Solution Overview
Problem
Existing hydrocyclone separators struggle with low separation efficiency for particle sizes between 100-1000 μm, with coarse particles ending up in the overflow and fines reporting to the underflow.
Innovation Solution
A hydrocyclone separator design featuring a tapered separation part and an apex discharge part with a specific curvature and symmetry axis, allowing for improved separation efficiency by balancing axial and tangential velocities to enhance retention time and guide particles to their appropriate discharge paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional hydrocyclone design is used, then separation efficiency for fine particles (5-100 μm) is improved, but separation efficiency for coarse particles (100-1000 μm) deteriorates
Solution Approach 1:
The invention applies local quality by creating a curved apex discharge part with specific geometric parameters (radius of curvature R between 0.05-0.2 times the internal diameter at the small end of the tapered separation part, and tangential angle β between 0°-40°). This localized curvature modification in the apex region optimizes flow patterns specifically for coarse particle separation without affecting the overall hydrocyclone structure or fine particle separation performance.
Solution Approach 2:
The invention changes geometric parameters of the apex discharge part, specifically introducing a curved surface with controlled radius of curvature and tangential angle. This parameter modification alters the flow dynamics and pressure distribution in the apex region, enabling effective separation of coarse particles (100-1000 μm) that cannot be separated by conventional straight-walled hydrocyclones.
2Length of moving object
If wider cyclones are used for coarse particle separation, then cut size (d50) increases, but separation efficiency decreases with coarse particles in overflow and fines in underflow
Solution Approach 1:
The invention applies spheroidality by replacing the conventional straight or flat apex discharge part with a curved surface having a specific radius of curvature. This curvature creates favorable flow patterns that enhance centrifugal forces and improve the separation of coarse particles, allowing them to report to the underflow rather than the overflow, thus maintaining high separation efficiency even with larger cyclone diameters.
3Measurement precision
If apex geometry is modified to improve coarse particle separation, then flow patterns change, but existing modifications do not significantly improve separation efficiency
Solution Approach 1:
The invention systematically changes the geometric parameters of the apex discharge part, defining specific ranges for radius of curvature (R = 0.05-0.2 × internal diameter) and tangential angle (β = 0°-40°). These controlled parameter changes create optimal flow patterns for coarse particle separation while maintaining manufacturing feasibility and avoiding excessive geometric complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves significantly improved separation efficiency for particle sizes between 100-1000 μm, with larger particles reporting to the underflow and smaller particles to the overflow, enhancing the sharpness of classification.
Implementation Method 1
a hydrocyclone is an enclosed vortical machine... Feed of a suspension of solids is supplied under predetermined pressure tangentially or in a volute path into the head part so as to create therein a swirling stream of fluid... the hydrocyclone will separate the particles of the slurry according to shape, size and specific gravity with faster settling particles moving towards the outer wall of the hydrocyclone
Implementation Method 2
The pressure will be lower along the central axis of the vortex and increase radially outwardly. The idea is that the hydrocyclone will separate the particles of the slurry according to shape, size and specific gravity
Data Source
AI summary
The present disclosure relates to a hydrocyclone separator for size classifying solid material in liquid suspension, comprising a head part, a tapered separation part, and an apex discharge part for underflow discharge, the tapered separation part being arranged between the head part and the apex discharge part, wherein the apex discharge part has a first opening aligned and attached with the tapered separation part, and has a second opening for underflow discharge in a surface opposite to the first opening, the first opening being larger than the second opening, and an inner surface of the apex discharge part has a curvature extending from the first opening to the second opening, and wherein the apex discharge part at the second opening ends in a curvature in a tangential angle, β, within the range of 0°<β<40° from a reference plane defined transverse to a common symmetry axis of the tapered separation part and the apex discharge part.